I would love a 550D or 7D, But I would also love to try some other non Canon products for comparison

Yep, me too, I'd love a 550D or 7D

I only have a Canon 1000D it's fine but doesn't have the megapixels to crop as much I need to sometimes, because what I photograph, birds etc, they are usually pretty far away, Me new lens (not Canon, Sigma) helps but new camera would be great.

I have 3 lenses that won't fit on other brands so they will obviously affect what I buy in the future, I mean I don't want to make 3 lenses useless after how much they cost me so I'll probably me sticking to Canon (not that I want to change that )

I haven't really tried any other brands, I had a Fujifilm for a while but it wasn't an SLR, 10X zoom was good but the quality was bad.

My DSLR and point and shoot are both Canon. I'm not in love with them or opposed to any other brand, it's just kind of the way things worked out. As it stands my most often used camera is the one on my iPhone, in any case.